Screen plate and mounting



`lune 7, 1955 E. H. KEIPER SCREEN PLATE AND MOUNTING Filed may 22. 195s B, wf@

TTURNEY United States latent''FV 2,710,150 SCREEN. PLATE AND MOUNTING Edwin H. Keiper, Philadelphia, Pa., assignor, byV mesne assignments, to Bath -Iron `WorksCorporation,"Bath, Maine, a corporation of Maine Application May 22,. 1.953,: Serial No..35,6,783

.This invention. relates.. .toi rotatingf.drumitypetfbreakers and particularly tothe mounting ofthe walls'ofthedrum .terial such as coal. The -breakerxfhas ;a..drum"with a cylindrical perforated Wallmounted. on longitudinal fextendingi supporting beams and. uniformly l. spacediaround .the drum. .The beams are fastened atftheiraendsto.ring-y shaped .members or spiders. to formasupportingrstructure for the drum. .The drum -wall comprises individual ,plates attached alongctheir longitudinal Ledges '1 to-.the

beams to forma continuous'surfacefrom. oneifend -of.1the

:drum to the other. The plates are perforated `with closely 4spaced openings. to passthe` brokenfcoal. ormaterial. .Extending v longitudinally along V.the .innen surface of the drum are circumferentially-jspaced..lifting-shelves which project inwardly. :.As'the drum rotates thefshelv'es pick the coal up anddrop it.

-An object of this inventionfiis to .provide ,means't'for easily and readily attachingandl detaching; screen plates tothe longitudinal supporting beams.

Another object of this invention-.isto` providelazscreen plate that readily and'securelyiits'on-.the-longitudinal supporting beams.

Another object of. this.. invention .is'to provide. atscreen plate that may be removed without disturbing the perpherally adjacent plates.

Another object -of .thisinventionfis .to. ..provide a means for attaching screen plates Without bolting the-, screen plates to the longitudinal supportingbeams.

Another object isitointerleave the'edges of the "screen plates without bolting the plates together.

Other and further objects of the invention will be apparent from the specification taken in connection with the accompanying drawings in which:

Fig. 1 is an outer fragmentary view of the drum; and

Fig. 2 is a cross-sectional view of the drum wall taken along lines 2 2 of Fig. 1.

The uniformly spaced supporting beams 10, 11 have anges 12, 13 and 14, 15 respectively and at inwardly facing mounting surfaces 16, 17 respectively. The screen plates 18, 19 and 20 are mounted on the beams and tightly secured thereto by the clamps or dogsl 21, 22. Each screen plate s similar with a central portion and longitudinal edge portions.

In Fig. 2 the screen plate 19 has a planar central portion 23 with edge portions 24, 25 along opposite edges of the central portion. The edge portions are bent at the same angle to the central portion and form bends or curved sections 26, 27 with the central portion. Along the curved portion 26 are stops 29 and along the curved portion 27 are stops 30. The edge portion 32 of plate 18 and the edge portion 33 of plate 20 have stops 34 along the bend 35 of plate 1S and stops 36 along the bend 37 of plate 20.

Studs are spaced along an edge portion of each plate for threading nuts thereon to hold the clamps. Clamps 2,710,150 Patented J une `7, .1955

ice

`2 y 21--arezimounted on studs.37 welded. to the outwardly Ifacing.surface:of.the.central portion 38' of. plate 18 adjacenttheiedge portionz: and .clamps 221are mounted on ...thetstudsY 39 welded tto; .theoutwardly facing surface i of the central portion 23 of the plate 19 adjacent thewedge portion-25. Nuts 42; 43.` are/.threaded on the studs 37 and"nuts.44,"45 are.threaded on the studs 39.to.securely hold;.the-respectiveclamps 21,.-22.

.The '-edgevportionsfof adjacent: anges overlap*l at the 101:.inwardly:facingsurfaces of. the supporting. beams. The edge'portions .132, 24 of plates...18, 19 overlap and-fare :..heldfin..overlappingfrelation by thestuds of plate `18,19 ..;and.,.the, clamp.21. ..1Sirriilarly'.' theiedge portions 25, 33 :of plates'..19, 20overlap-zandliare.'held:inoverlappingrela- '.tionbythe studsJofiplate v.19,20 and. clamp` 22.

Theledge: portion 25.::is held .in position by the stops-30 :bearing against ther.end'.or..edge ofjthe secured plate"20 .,andxthe'clampingof ther'plater19 to the Wedge-shaped .'.ange .14 by..the-clampsf22. AThe stops -29l bear against -'.'.the.ange..131to.furtherposition the plate 19. Thel edge portion .24 .is. pressed down Aagainst the'` beam 10' bysthe clamp 21 solthatlthe stops-29-will bear against llange 13. The edge portion 32 is positioned by the stop.34 to* over- -llap withthei'edge 'portion' 24f=and` the inwardly facing J surface. `.The 4plates Aareheldin'position by the coaction "ofxthe 1successive :plates on the. preceding plates. j 'The ".interbra'cingfoffthe plates-'and-.clamping -forms a rigid and secure drum wall.

The clamps 21, 22 have elongated holes 46, 546e respec- 1tively"to'passtheastuds37, 39. The feet 47,-48 of the clamp zlvbeanagainst thecentrallportion of theft-plate 118 .and theiflange 12 respectively. A guide v49 Ibetween the two feet engages the edgev ofthe flange 12 topositi'on Y'the uclamp. The feet'Sl, 52of clamp 22 bear VVagainst the ycentralfportion .of the-.plate 19and the ange 14 f respectively. The-guide 53 between the two feet -engages the V edge. of the ltlange 14.

'The clamps-21 -are tightened by the lnuts '42,'Y 43 `threaded on'the'studs 37. rv'The feet- 47,'48 bear against 401the centralfportioni of' plate 18 and flange"- 12 respectively. As thefnutsfare'rtightened the edge portion v32'is drawn against the edge portions l24 of plate 19 and the stops 34, 129l are-drawn-'into vlocking" relation'iwith the end iof plate 191'andange 13 to preventany lateral or peripheral rnovement-'1of' the -two plates. The clamp '21 andL stud '37f-1holdthef plates `from moving radically inward.

'The-Hedges 55 of -therscreen'plate-extendiperipherally around the drum and are in abutting Contact to prevent the plates from moving longitudinally. Thus in each direction the plates are firmly held. The plates form a drum structure that is not directly bolted to the supporting beams.

A screen plate can be mounted or removed without aiecting the portion of the other adjacent plates or dis- 55 turbing them to any appreciable extent. The plate 19 may be removed by unthreading the nuts 44, 45 and loosening or unthreading the nuts 42, 43 on stud 37. The end of plate 19 with stud 39 may be pulled into the interior of the drum and the edge 24 drawn from between the edge portion 32 of plate 18 and the flat inner surface of the beam llt). The plate 18 and the plate 2i) are both securely held along the other edges (not shown) so that the two plates remain in position.

A screen plate 19 may be mounted fitting the edge portions 24 in between the loosened or free edge portions 32 and beam 10. The edge portion 24 may then be fitted in place and the clamps 22 secured on the studs 39. The stops 29 and 30 are tted between the flange 13 and the end of plate 20 so that the screen plate 19 with the edge portions will tit snugly in place and hold the plate against transverse movement on the frame.

Lifting shelves 57 may be mounted on the inner Wall ,portions of the plate. `the drum the coal piles up on the central portion and of the drum and extend inward towards the center. Holes are provided in the edge portion adjacent the clamp. On plate 18 holes 58 are provided in the edge portion 32. The shelf 57 is attached to the plate by the bolts 59 extending through the edge portion and the base 60 of the shelf. Nuts 61 are threaded on the bolts to securely hold the shelves in place. The adjacent plate 19 may be removed without disturbing the attachment of the shelf to plate 18.

The weight of the coal is carried by the screen plates and passed to the beams depending on the position of the drum wall plate. When the plate is at thebottom of the load is transmitted to the beams through the edge As the shelf and adjacent plates move up on the side of the drums the coal slides on the drum wall and catches in the lifting shelf. As the shelf turns to a more horizontal position the weight of the coal is carried by the shelf and transmitted through the bolts 59 to the screen plate. The ridge 49 on the clamp 21 rests on the edge of the iiangellZ of the beam so that the weight of the coal on the shelf is carried by the beams through the studs and clamps spaced along the screen plate. The load may also be transmitted to the succeeding beam 11 through the stops to the succeeding clamps 22. Thus the load on one shelf is distributed to adjacent supporting beams.

In the above description the various features and elements of the invention have been specifically described for purposes of clarity. It is understood that various modifications and changes may be made without departing from the scope of the invention.

I claim:

l. A breaker drum wall comprising longitudinal supporting beams evenly spaced circumferentially around the drum and each having a at inwardly facing mounting surface, a drum Wall plate mounted on said rail beams and having a central portion and two edge portions extending longitudinally along opposite edges of the central portion and bent on the same side of the central portion at an angle thereto to fit in overlapping relation with said inwardly facing mounting surfaces, a clamp attached to the central portion of the drum plate and l having an engaging projection gripping'said beam to hold one of said edge portions in overlapping position.

2. A breaker drum wall comprising longitudinal supporting beams evenly spaced circumferentially around the drum and each having a flat inwardly facing mounting surface, a drum wall plate mounted on said rail beams and having two edge portions extending longitudinally along opposite edges of the plate to t in overlapping relation with said inwardly facing mounting surfaces, a clamp attached to the drum plate and having an engaging projection gripping said beam to hold one of said edge portions in overlapping position.

3. A breaker drum Wall comprising longitudinal supporting beams evenly spaced circumferentially around the drum and each having a flat inwardly facing mounting surface, a drum wall plate mounted on said rail beams and having a planar central portion and two edge portions extending longitudinally along opposite edges of the central portion and bent on the same side of the central portion at an angle thereto to tit in overlapping relation with said inwardly facing mounting surfaces, a clamp attached tothe central portion of the drum plate and having an engaging projection gripping said beam to hold one of said edge portions in overlapping position.

4. A breaker drum wall as claimed in claim 3 wherein stops are provided on said central portion adjacent the respective edge portions, said stops along the other of said edge portions bearing against the adjacent beam and the stops along the edge portion adjacent said clamps bearing against an overlapping edge portion of an adjacent plate.

5. A breaker mill as claimed in claim 4 whereina lifting shelf is mountedon one of the edge portions.

6. A breaker drum wall comprising longitudinally extending and even circumferentially spaced supporting beams, each beam having an inwardly facing mounting surface, screen walll plates having uniformly spaced openings and mounted on said lbeams to form a substantially cylindrical perforated drum for passing material below a given size, each plate having a planar central portion and two mounting edge portions extending longitudinally valong oppositel edges of the central portion and bent inwardly at an angle to the central portion to fit in overlapping relation with said inwardly facing mounting surfaces, circumferentially adjacent plates having the mounting edge portions overlapping each other and said beam mounting surface, a clamp attached to the central portion adjacent the innermost edge portion, said clamp having an engaging projection gripping said beam and holding the intermediate edge portion between said innermost edge portion and the mounting surface to rigidly secure said plates to said beams.

UNITED STATES PATENTS References Cited in the tile of this patent -583,216 Phillips May 25, 1897 1,563,173 Doerres Nov. 24, 1925 

